Ighalo, who has previously vie for Watford within the Premier League, is present with Shanghai Shenhua.
The former Super Eagles star scored thirty-three goals in eighty-two matches throughout his spell at Vicarage Road.
United also is gazing at Islam Slimani, who is on loan at Monaco from Leicester.
The Red Devils are considering loan offers for the 2 African strikers, as Ole Gunnar Solskjaer looks for a short-term replacement for the injured Marcus Rashford.
Rashford is set for an extended spell on the sidelines, after suffering a break in his back.